package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class CategoryServiceImpl implements CategoryService {
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 新增分类
     * @param categoryDTO
     * @return
     */
    @Override
    public void save(CategoryDTO categoryDTO) {
        Category category = new Category();

        // 拷贝部分信息
        BeanUtils.copyProperties(categoryDTO, category);

        // 设置分类状态为不可用
        category.setStatus(0);
//        category.setCreateTime(LocalDateTime.now());
//        category.setUpdateTime(LocalDateTime.now());
//        category.setCreateUser(BaseContext.getCurrentId());
//        category.setUpdateUser(BaseContext.getCurrentId());

        categoryMapper.insert(category);
    }

    /**
     * 分类信息分页查询
     * @param categoryPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO) {
        // 分页查询
        PageHelper.startPage(categoryPageQueryDTO.getPage(), categoryPageQueryDTO.getPageSize());
        Page<Category> page = categoryMapper.pageQuery(categoryPageQueryDTO);

        long total = page.getTotal();
        List<Category> records = page.getResult();

        return new PageResult(total, records);
    }

    /**
     * 启用禁用分类
     * @param status
     * @param id
     * @return
     */
    @Override
    public void startOrStop(Integer status, long id) {
        Category category = Category.builder().id(id).status(status).build();
        //.updateUser(BaseContext.getCurrentId())//.updateTime(LocalDateTime.now())

        categoryMapper.update(category);
    }

    /**
     * 修改分类信息
     * @param categoryDTO
     * @return
     */
    @Override
    public void update(CategoryDTO categoryDTO) {
        Category category = new Category();

        BeanUtils.copyProperties(categoryDTO, category);
//        category.setUpdateUser(BaseContext.getCurrentId());
//        category.setUpdateTime(LocalDateTime.now());

        categoryMapper.update(category);
    }

    /**
     * 根据类型查询分类
     * @param type
     * @return
     */
    @Override
    public List<Category> list(Integer type) {
        return categoryMapper.list(type);
    }

    /**
     * 删除分类
     * @param id
     * @return
     */
    @Override
    public void delete(long id) {
        // 查询是否关联菜品
        Integer count = dishMapper.countByCategoryId(id);
        if(count > 0) {
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }
        // 查询是否关联套餐
        count = setmealMapper.countByCategoryId(id);
        if(count > 0) {
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        categoryMapper.delete(id);
    }
}
